Why don't GBP promote an in-house megafight, JMM vs. Mosley?

[Kel]

Mosley is far too big for Marquez. Let's remember Marquez is really a lightweight and has spent most his time in lower weight classes.

Shane Mosely has gone to Junior-Middleweight at one stage.

I'ld think this is a mismatch.

GBP is pushing for a PAC-Mosley fight up to the point of ridiculously saying that PAC is avoiding Mosley...

If PAC-Mosley is OK with GBP, JMM-Mosley would be too...
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You already know the answers so why do you bring it up? Pac already fought at 147 and beat the man at 140. JMM has not even fought at 140. It's really not that hard